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Vancouver, BC – September 18, 2017: Bonterra Resources Inc. (TSX-V: BTR, US: BONXF, FSE: 9BR1) (the “Company” or “Bonterra”) is pleased to announce that the ongoing resource development program in and around the Gladiator Gold Deposit has successfully further extended the Main, Footwall and North Zones by increasing the strike and depth by up to 300 m depth to the known mineralized horizons. Results from six recent drill holes significantly expand the size and confirm the continuity of the Gladiator Gold Deposit.

Highlights and Observations:

Results from six recent drill holes significantly expand the size and confirm the continuity of the Gladiator Gold Deposit.

Holes BA-17-20, BA-17-28, BA-17-31 and BA-17-32 collectively add 300 m depth and strike to the Main Zone. This extension occurs under plunge to the west below the Rivage Gap to a depth of over 650 m. A highlight of this significant extension is BA-17-20 which intersected 3.0 m of 10.4 g/t Au at 550 m below surface.

Continuity of mineralization is now confirmed over a total drilled strike length (to date) on at least two horizons (Main and Footwall) of 1,200 m, as well as a drilled depth of 1,000 m.

Nav Dhaliwal, CEO and President, stated,“Our resource development program at the Gladiator Gold Deposit continues to successfully extend the western mineralized zones along strike and at depth. The predictability of our geological model is now considered to be dependable in projecting the on-strike and at-depth geometry of gold-bearing zones. In addition to once again expanding the size of the Gladiator Deposit, our geological model has demonstrated additional success up to 8 km westward, in the southern part of our Coliseum property (see press release of September 15, 2017).”

Hole

From(m)

To(m)

Length*(m)

Grade(g/t Au)

Zone/Area

BA-17-20

779.0

782.0

3.0

10.4

Main

BA-17-23

541.5

544.5

3.0

10.1

Footwall Zone

BA-17-28

700.5

704.0

3.5

5.3

Main

BA-17-30

630.0

632.0

2.0

6.0

North

BA-17-31

661.0

669.3

8.3

5.1

North

810.5

813.3

2.8

3.8

Main

BA-17-32

901.0

905.0

4.0

5.6

Main

Stated lengths are core width as drilled, true widths vary and average between 60 and 80 percent of drilled widths. Core axis angles of the intersection contacts and surrounding rock units average 55 to 70 degrees.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

This press release contains "forward-looking information" that is based on Bonterra’s current expectations, estimates, forecasts and projections. This forward-looking information includes, among other things, statements with respect to Bonterra’s exploration and development plans. The words "will", "anticipated", "plans" or other similar words and phrases are intended to identify forward-looking information.Forward-looking information is subject to known and unknown risks, uncertainties and other factors that may cause Bonterra’s actual results, level of activity, performance or achievements to be materially different from those expressed or implied by such forward-looking information. Such factors include, but are not limited to: uncertainties related exploration and development; the ability to raise sufficient capital to fund exploration and development; changes in economic conditions or financial markets; increases in input costs; litigation, legislative, environmental and other judicial, regulatory, political and competitive developments; technological or operational difficulties or inability to obtain permits encountered in connection with exploration activities; and labour relations matters. This list is not exhaustive of the factors that may affect our forward-looking information. These and other factors should be considered carefully and readers should not place undue reliance on such forward-looking information. Bonterra disclaims any intention or obligation to update or revise forward-looking information, whether as a result of new information, future events or otherwise.